Add debug message to test_heaps_grow_independently

peterzhu2118 · peterzhu2118 · commit 6346e86b2130 · 2025-04-19T20:10:39.000+09:00
To debug flaky failures on i686 that look like: 1) Failure: TestGc#test_heaps_grow_independently [test/ruby/test_gc.rb:704]: Expected 2061929 to be < 2000000.
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
@@ -701,7 +701,9 @@ def allocate_large_object = Array.new(10)
         allocate_large_object
       end
 
-      assert_operator(GC.stat(:heap_available_slots), :<, COUNT * 2)
+      heap_available_slots = GC.stat(:heap_available_slots)
+
+      assert_operator(heap_available_slots, :<, COUNT * 2, "GC.stat: #{GC.stat}\nGC.stat_heap: #{GC.stat_heap}")
     RUBY
   end
 
